<template>
    <div>
        <div class="city-search">
            <input v-model="keyword" type="text" class="search-input" placeholder="请输入城市名或者拼音">
        </div>
        <div class="search-cont" ref="search" v-show="keyword">
            <ul>
                <li class="search-item border-bottom" v-for="item of list"
                :key="item.id" @click="handleCityClick(item.name)">
                {{item.name}}
                </li>
                <li class="search-item border-bottom" v-show="hasNoData">
                没有找到匹配数据
                </li>
            </ul>
        </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
export default {
    name:"CitySearch",
    props:{
        cities:Object
    },
    data () {
        return {
        keyword: '',
        list: [],
        timer: null
        }
    },
    computed: {
        hasNoData () {
            return !this.list.length
        }
    },
    methods: {
        handleCityClick(city){
            this.$store.commit('changeCity',city)
            this.$router.push('/')
        }
    },
    watch: {
        keyword () {
            if (this.timer) {
                clearTimeout(this.timer)
            }
            if (!this.keyword) {
                this.list = []
                return
            }
            this.timer = setTimeout(() => {
                const result = []
                for (let i in this.cities) {
                    this.cities[i].forEach((value) => {
                        if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
                            result.push(value)
                        }
                })
                }
                this.list = result
            }, 100)
        }
    },
    mounted () {
        this.scroll = new Bscroll(this.$refs.search)
    }
}
</script>

<style scoped>
    .city-search{
        height:.72rem;
        padding:0 .1rem;
        background: #00bcd4;
    }
    .city-search .search-input{
        width:100%;
        height:.62rem;
        line-height:.62rem;
        text-align:center;
        border-radius:.06rem;
        box-sizing:border-box;
        padding:.1rem;
        color:#666;
    }
    .search-cont{
        z-index:1;
        overflow:hidden;
        position:absolute;
        top:1.58rem;
        left:0;
        right:0;
        bottom:0;
        background:#eee;
    }
    .search-item{
        line-height: .62rem;
        padding-left: .2rem;
        background: #fff;
        color: #666;
    }
</style>